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error[E0057]: this function takes 2 arguments but 1 argument was supplied
--> $DIR/issue-99482.rs:3:14
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LL | let _f = f(main);
| ^ ---- an argument of type `()` is missing
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note: closure defined here
--> $DIR/issue-99482.rs:2:13
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LL | let f = |_: (), f: fn()| f;
| ^^^^^^^^^^^^^^^^
help: provide the argument
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LL | let _f = f((), main);
| ~~~~~~~~~~~
error: aborting due to previous error
For more information about this error, try `rustc --explain E0057`.
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